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Finding the Fourth Proportional to 128,594.24, 177,463.20 and 72,017.12

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Solution

The fourth proportional to 128,594.24, 177,463.20 and 72,017.12 is: 99,385.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,594.24 : 177,463.20 = 72,017.12 : x
  2. Step 2: Convert to fraction form
    128,594.24/177,463.20 = 72,017.12/x
  3. Step 3: Cross multiply
    128,594.24x = 177,463.20 × 72,017.12
  4. Step 4: Simplify right side
    128,594.24x = 12,780,388,569.98
  5. Step 5: Solve for x
    x = 12,780,388,569.98/128,594.24
  6. Step 6: Final answer
    x = 99,385.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.